Unable to launch to Android device

UE 4.12.5
Win10
VS2015
Samsung S6
Codeworks 1R4u2

Using a blank project for a mobile device, launching with ASTC causes a launch failure within 30 seconds. Launching with ETC1, ETC2 and Android creates a black, UE splash screen on the device, but nothing else. What am I doing wrong?

102864-sdksettings.png

[Log ][2]